text: # Copyright 1999-2021 Alibaba Group Holding Ltd.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from .sort_values import DataFrameSortValues
  from .sort_index import DataFrameSortIndex
  
  
  def _install():
      from ..core import DATAFRAME_TYPE, SERIES_TYPE
      from .sort_values import dataframe_sort_values, series_sort_values
      from .sort_index import sort_index
  
      for cls in DATAFRAME_TYPE:
          setattr(cls, "sort_values", dataframe_sort_values)
          setattr(cls, "sort_index", sort_index)
  
      for cls in SERIES_TYPE:
          setattr(cls, "sort_values", series_sort_values)
          setattr(cls, "sort_index", sort_index)
  
  
  _install()
  del _install
  